Originally Posted by Triple_Se7en
Originally Posted by neo3
Are there any difference in current oil specs and/or brands (5W30 synthetics) that relate to reducing carbon build-up on pistons? This is for a non-direct-injection LS engine. Those cleaners you can spray in while the engine is running really don't touch this stuff, in my experience. The best thing is obviously to prevent the oil from getting into the combustion chamber in the first place, but that is just not entirely possible. Does the dexos 2 spec have any advantage in this area?
If you read the Pennzoil Yellow Bottle, Pennzoil Gold, Pennzoil Platinum and Pennzoil Ultra Platinum labels, engine cleanliness percentages escalate as you move up the ladder with these brands.
No other manufacturer has been successful in court, trying to get the Pennzoil document on these 'Platinum' labels removed. When a company claims in-writing they are better at the business of cleanliness amongst other leading brands - and that wording remains year-after-year, that should tell you and myself something right there.
..... and yet, I've put my two jugs of Platinum aside for now and will begin my new 2019 Hyundai OCIs using Mobil-1 EP.
Go figure! Sometimes we just don;t believe, what's right there in black & white in front of us. I have chosen to delay using Platinum. Why?..... because my new Hyundai engine is not dirty yet and may never get dirty, after looking at so many pics of engine-innards that use Mobil-1/EP.
makes no sense, have anything to back this up, Pennz Platinum is in my 17 Regal GS 2.0T so she'll stay clean from the start, no need to jump ship after 50+ years of Pennzoil.